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Finding the Fourth Proportional to 491.13, 677.79 and 270.09

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Solution

The fourth proportional to 491.13, 677.79 and 270.09 is: 372.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    491.13 : 677.79 = 270.09 : x
  2. Step 2: Convert to fraction form
    491.13/677.79 = 270.09/x
  3. Step 3: Cross multiply
    491.13x = 677.79 × 270.09
  4. Step 4: Simplify right side
    491.13x = 183,061.76
  5. Step 5: Solve for x
    x = 183,061.76/491.13
  6. Step 6: Final answer
    x = 372.74

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.